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Mathematics 17 Online
OpenStudy (anonymous):

assume that variables can represent any real number (see coments)

OpenStudy (anonymous):

\[\sqrt{(a+9)^2}=\]

OpenStudy (binary3i):

=|a+9|

OpenStudy (anonymous):

Let (a+9)=x \[\sqrt{x^2}=\left| x \right|\] i guess you might know the answer from here onwards.

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